From mboxrd@z Thu Jan 1 00:00:00 1970 From: Da Powah Subject: Re: Passthrough of 2 PCI devices works 80% (Kernel 2.6.37, Debian Squeeze, Win7 VM) Date: Sun, 20 Feb 2011 01:16:21 +0000 (UTC) Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from lo.gmane.org ([80.91.229.12]:52615 "EHLO lo.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753822Ab1BTBQe (ORCPT ); Sat, 19 Feb 2011 20:16:34 -0500 Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1Pqxub-0004u9-5n for kvm@vger.kernel.org; Sun, 20 Feb 2011 02:16:33 +0100 Received: from i577AB458.versanet.de ([87.122.180.88]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 20 Feb 2011 02:16:33 +0100 Received: from dapowah by i577AB458.versanet.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 20 Feb 2011 02:16:33 +0100 Sender: kvm-owner@vger.kernel.org List-ID: > Hi Alex, > > i got some more output and i am getting closer: i installed mythbuntu as vm and > tested with both cards and with one only card via passthrough. One card > assembled works nice, two cards assembled gives me an error: there is no > frontend0 found in '/dev/dvb/adapter0/frontend0'. A look into both dmesg and a > diff shows, that there is a change in the IRQ Number (10->11) and the eeprom of > the device couldnt be read. I am not able to take a conclusion of that - maybe > you can give me one more hint. > > I will try tomorrow to use both devices on 'bare metal' to make sure it is > working in this configuration. More infos will come. [....] Hi Alex, i tested on 'bare metal' and it worked - i was able to run a scan on both cards and '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter1/frontend0' are available. But the time i rund MythBuntu or any other vm with both cards passed through, something goes wrong. I`ve got 3 PCI slots behind that PCIe2PCI bridge and i swapped the cards among them - it has no effect. So i assume it depends on the kvm / kernel... Some other suggestions ? Kind Regards, DP